Shi Yuanzhong (史元忠) (died October 14, 841) was a Chinese military general of the Tang Dynasty, serving for several years as the military governor (Jiedushi) of Lulong Circuit (盧龍, headquartered in modern Beijing) and ruling it in de facto independence from the imperial government until he was killed in 841.

Virtually nothing is known about Shi Yuanzhong's background, including where he was born or where his family was from. As of 834, he was serving as a battlefield commander (兵馬使, Bingmashi) at Lulong, when the soldiers mutinied and expelled the military governor Yang Zhicheng and the eunuch monitor of the army Li Huaiwu (李懷仵). The soldiers supported Shi to be their leader. Subsequently, after Shi submitted articles of clothing and other equipment that were of design only appropriate for an emperor, which Yang had made, to then-reigning Emperor Wenzong (to show that Yang had inappropriate ambitions), Yang was executed, and Emperor Wenzong made Shi the acting military governor (留後, Liuhou). In 835, Emperor Wenzong made Shi military governor.

Little is known about Shi's governance of Lulong. In 841, there was another disturbance at Lulong, and Shi was killed in the disturbance. The soldiers initially supported the officer Chen Xingtai to take over the circuit. Then-reigning Emperor Wuzong (Emperor Wenzong's younger brother), under the advice of the chancellor Li Deyu, declined to take immediate action on petitions submitted on Chen's behalf for Chen to become military governor. Soon thereafter, Chen himself was assassinated, and the soldiers supported another officer, Zhang Jiang to be their leader. Emperor Wuzong similarly declined to act on petitions on Zhang's behalf. Thereafter, when Lulong officer Zhang Zhongwu, who was then the commander of Xiongwu Base (雄武軍, in modern Chengde, Hebei), requested imperial commission and permission to attack Zhang Jiang, Emperor Wuzong, again under Li Deyu's advice, agreed, and Zhang Zhongwu soon captured Lulong's capital You Prefecture (幽州) and took over the circuit.

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史元忠（？ - 841年），唐朝將領，曾任盧龍節度使並實質獨立于朝廷，直至841年被殺。

史元忠的生年和家庭背景都無記載。太和八年（834年）九月，他在盧龍任兵馬使，正逢士兵兵變驅逐了節度使楊志誠和監軍宦官李懷仵。士兵擁戴史元忠為首。十月，史元忠自稱權句當節度兵馬。十一月，當史元忠向當時在位的唐文宗呈上楊志誠所製作的帝王服飾，指出楊志誠懷有異志時，楊志誠被處死，十二月，文宗任史元忠為左散騎常侍、幽州大都督府左司馬、知府事，充節度留後。九年（835年）二月，轉檢校工部尚書、節度副大使，知節度事。又授左僕射。

史元忠對盧龍的治理記載很少。就任當年，他特署周元長為兩節度都押牙。開成初年，他與河東節度使李載義累表為潮州司戶參軍事李宗閔辯解，使其被徙為衢州司馬。二年（837年）十二月，奏當管八州准門下牒追刺史右魚各一隻，乞求另賜新銅魚，獲准。五年（940年）四月，以起複守左金吾衛上將軍員外置同正員、幽州盧龍節度副大使知節度事、觀察處置押奚契丹兩番經略盧龍軍等使、檢校司徒、兼幽州大都督府長史、御史大夫的身份建成西山上佛經銘。

會昌元年（841年）九月，盧龍又一次騷亂，史元忠被偏將陳行泰所殺。士兵起初擁戴陳行泰接管盧龍自稱知留務。當時在位的唐武宗在宰相李德裕建議下，沒有立刻回複請求以陳行泰為節度使的表章。閏九月陳行泰被次將張絳所殺，士兵又推立張絳。武宗同樣沒有批准請求以張絳為節度使的表章。十月，雄武軍指揮使張仲武向朝廷請求討伐張絳，武宗在李德裕建議下同意了，張仲武很快攻占了盧龍軍部幽州，接管了盧龍。

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